"I have enjoyed some of the best moments of my career here and I hope to experience many more. I'm very happy."

Sporting director Monchi added: "The bond I have with Diego is special. I had the fortune to observe his first steps in European football in person at Sevilla, and now I have the pleasure to assist him as he becomes a valuable player at a great club like Roma."

Eusebio Di Francesco's side are fourth in Serie A, five points adrift of leaders Inter but with a game in hand.